Liquid filter installation



Nov. 26, 1946. E. G. GUNN .LIQUID FILTER INSTALLATION Filed May 10, 1944 3 Sheets-Sheet 1 l l INVEN-ron 'a/ f/ 4. @xl/IM www? Filed May 1o,4 1944 3 sheets-sheet .2

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ATTO R N EY S Nv. 26, 1946. E. G. GUNN 2,411,539

' LIQUID FILTER INSTALLATION Filed May '10, 1944 3 Sheets-Sheet 5 INVENTOR ATTORNEYS Patented Nav. 2e, 1946v l 2,411,539v l y -Liomn Fmrsit ms'rArLArroN Earl G..Gunn, Providence,

Corporation, a corporation of Rhode Island Application May 10, 1944, Serial No. 534,929

6 Claims.

This invention relates'tovthe installation of 'a filter.

In the use of a filter of the type installed for the filtering of lubricant in an internal combustion engine, it is frequently diflicult to keep the filter warm where flow is slow determine the condition of the filter and especially is this true where a series of iilters are hooked up in a parallel relation.

One of the objects oi this invention is to arrange a filter for removing from the liquid substantially all of the lterable material in a single paSS.

Another object of this invention is to kee'p a filter warm'where the liquid to be iiltered is considerably above room warm liquid which is to be filtered especially where the ltrate passes'rather slowly through the illter.

Another object of this invention is to provide a citer and conduits thereto so that the nitered oil may be bled or examined in its return to the lreservoir whereby the condition of this ltered oil may be determined and from this condition one may judge whether the iilter has reached its con\ taminant collecting capacity.

Another object of be tested in this manner.

With these and other objects in view, the in. vention consists of certain novel features of construction, as will be more fully described and parv connected in parallel with relation to the oil sump of the engine;

Fig. 2 is a view taken on substantially line 2--2 of Fig. 1; y

Fig. 3 is a sectional view of the lter unit;

Fig. 4 is' a sectional view of a conduit control in the iiow line of the system;

Figs. 5, 6, 7, and8 are but illustrating diiierent modied arrangements.

In carrying out this invention I utilize a filter unit of the type wherein the liquid is ltered b y a single pass of the liquid through the filter unit. More specifically the type of unit which I utilize is that illustrated in the application of Richard V. Hicks, July 10, 1943. The lter case provides an arrangement so that oil may'enter and leave .the

and also diilicult totemperature by use of the l l this inventionis to so. arrange the conduit system that any one of a plurality of lters connected in parallel relation may illustrating in views similar to Fig. 1 4

R. I., assignor to `lrmn case without being filtered which maintains circulation to keep the whole warm while the oil that is filtered will move inwardly through the iilter medium and leave the unit through the center thereof. The `casing itself thus may be connected so that it forms which may be supplied under pressure while the clean oil is separately conducted back to the reservoir. Suitable controls are inserted that the clean oil may be eitherl bled or so controlled in its flow that where a'plurality of units are used any one 'of the units maybe whereby the clean oil that selected for bleeding it is passing may be examined. A transparent section may be inserted for examination where desired.

With reference generally an internal combustion engine disclosing a cylinder ll, water jacketed as at I2 with a piston i3 in this cylinder having aconnecting rod Il connecting it to the crank shaft I5 which is housed by casing i6 providing' a sump I1 for containing the lubricating oil. A pump for the circulation of this oil is designated i8 which will draw oil through the conduit I9 from the sump I'l -and discharge it through the conduit 20 under pressure through the filter units designated generally 2l which may be arranged in a battery of any number and hooked up in parallel relation. y

Each ofthese iilter units as shown in greater. detail in Fig. 3 comprises a casing -22 oi. a suitable cross sectional shape, the shape here shown being for illustration cylindrical, with an inlet opening 23 at'one end and a similar opening 24 adjacent' its other end. AA cover 24' for this case is provided and may be held in place by a bolt 25 which threads into a center tube 26 about which the removable cartridge-21 is located. This cartridge 21 is of a casing having perforations in .its cylindrical wall Serial N0. 494,223 :led- I 28 while its ends are imperforate and are sealed with the tube 26 so that oil cannot pass into the center tube at either end ofthe cartridge. The

arrangement is such that nitrate may pass laterally: from the outside of the cartridge inwardly through the `lter medium- 21H and enter the center tube 26 where it is discharged through -a conduit 30 leaving the lterable material in the iilter medium in a single pass ofthe liquid therethrough as distinguished from repeated passes in some filters. I'he ii-lter medium consists of a plurality of disks 21 more speciilcally described in the above-mentioned Hicks application Serial No. 494,223. Thearrangement is such that the illtrate or ltered oil enters the center tube to discharge downwardly through the conduit 3U.

a by-pass -for the oil to the drawings.. I0 designates shape`v similar to the i duit 3l collects clean of the valves of the various in the engine block. The header 3i is connected directly to the header 33 by a conduit 36 of smaller internal diameter than the diameter of the conduit 28,35, or 33. A common return pipe or conoil from the conduits 30 and returns it to the sump through its discharge 33. A glass tube 39v may be inserted in this conduit that the condition of the filtered oil may be observed.

A control d, shown in greater detail in Fig. 4, is placed at the junction oi' the conduits 3i) and 3l and comprises a valve tl which may be rotated in its body portion one of the four lines or conduits A, B, C, D, which extend outwardly at 90 apart from the center of this body. A suitable handle i3 is provided for rotating this valve to the desired position.

Pump id will draw lubricant from the sump il and force it under pressure into each of the casings` from theheader 3i. Sonie of this oil will pass upwardly through the casing or unit, by-passing the nlter 2i, and passing outwardly through the conduit 3d to the header 33 and then tube 2S will be at zero pressure and consequently some of the oil under pressure will pass through the filter medium Z'l' and into the center tube 26 and thence downwardly through the conduit tu into the return conduit 3l' and thence back to the sump as at 38.A This oil will be cleaned in a single pass through the filter. If it is desired to determine the condition of the oil returned from the entire battery of filter casings, it may be observed at the glass 39, or if it is desired to tap oil from all of the lter batteries the valve below the casing nearest to the reservoir will be turned to position D (see Fig. 4) when oil entering through positions A and B will be discharged through position C and out of the tap 45.

If it is desired to tap oil from all but this particular casing then the closure will be moved to position A. If it is desired to tap oil from only this particular unit the closure will be moved to position B. It will be readily apparent that any selected group of i'llters may be tested by use of a valve of this character or any particular unit may be tested by suitable manipulations units which go to form up the battery.

If dirty oil is coming from any one of the filter units, it will be observed and the cartridge therein may be replaced.

In some cases where it is unnecessary to warm the lter, the header 33 and the conduits 34 may be omitted from the point 48 of the connection of the conduit 36 so that a by-pass relationship in the filter unit 2i is not used as shwn in Fig. 8. In this case all by-passing will occur outside of the lter unit and such pressure as occurs in the iilter unit will cause the oil therein to be passed through the filtering medium and the nitrate to be discharged through the conduit 3D.

In Fig, 5 I have illustrated an arrangement which is similar to the showing `in Fig. 1 except that a separate sump 5i! is provided and a cond so as to block oi any4 duit 5| conducts oil from the sump IT of the engine to the sump 50. This arrangement provides a dry sump in the engine crank case. Corresponding parts are designated by the same reference characters where they are identical with Fig. 1 or with the same reference characters with a prime added where they are similar in function but not identical inshape,v length or size.

In Fig. 6 I have illustrated ltration for the lubricant in a scavenger circuit. This circuit may be used regardless of the oil temperature. The

` pump I8 will draw the liquid through the conduit i S from the sump l1 and conduct it through the conduit 2li and header 3i to the lter unit 2i and to the header 33 in the same manner as lillustrated in Fig. 1. The conduit 36 will be of a size smaller than the conduits of the headers 3| and 33 and'by this shunt arrangement turbulence in the filter is minimized. Separate sump is provided and a conduit 56 extends from the header 33 to this sump. A pressure regulator valve valve 5T may be placed in this conduit as well as a pressure gage 58. The same arrangement for the discharge of clean oil which is passed through the filter is illustrated in Fig. 6 as in Fig. 5, there being conduit 37 in which the various valves d2 are provided which liave their taps d5, the discharge spout being designated 38'.

In Fig. 7 I have illustrated a sump il of an internal combustion engine but from its arrangement it is quite evident that iltration is not particularly connected with the engine and might [be arranged for the filtration of oil from sump entirely separate from the engine. The pump IB is driven from a motor and draws oil from sump l'l to the conduit I9, discharging through the conduit 20 to a header 3l which supplies the filter casings 2l, The header 33 is connected to the casing as at 34 similarly as heretofore described and includes a pressure gage 58 and presl sure regulator valve 59, while the conduit 56 returns to the sump discharging as at 6l. Clean oil is collected by a conduit 31 from each of the nlters as at 30 through the control valves d2 having taps45 While it is connected back to the sump through the discharge 38.

The operation of the various flow circuits illustrated will be clear from the description of the circuit given in Fig. 1. By-passing the oil through the filter casing will cause it to be warmed up and the oil becomes warm so that better operation may be had. .By the use of the pressure gage pressure on the oil may be observed at all times'while by the use of the pressure regulatorvalve the flow of the oil may be checked or controlled at certain desired pressure.

It will be observed that the liquid supplied by the pump in each of the Various modifications except Figures A6 and 7 passes into the lubricating system of the internal combustion engine, with the exception of the filtrate or amount of lubricant which passes through the filter medium and returns to the lubricant reservoir.

I claim: v

l. In combination with an internal combustion engine, having a circulating lubricating system, including a reservoir for lubricant which may be contaminated, a pump to withdraw lubricant therefrom and circulate the same to a point of use, eventually returning the lubricant to the reservoir, a ltering unit comprising a casing in said circulating system, having continually open inletl and outlet conduits through which lubricant flows to the point of use by the action of said pump and by-passing the filtering element. fa .filtering element in said casing through which -ltratepasses from the lubricant and a separate conduit to return said iiltrate to said reservoir. 2. The combination set forth in claim 1, wherein said iiltering unit is in shunt relation to said d pump circulated lubricating system.

3. The combination set forth in claim 1, wherein a continually open conduit connects said inlet and outlet conduits to place said iiltering unit in shunt relation to said pump circulated lubricatins system.

in said ltering unit comprises a plurality of flif ters arranged in parallel relation.,

6. The combination set forth in claim 1, wherel in the lubricant reservoir is the crankcase sump G.GUNN. 

